Tilting chair

ABSTRACT

303,139. Stoll, A. Dec. 29. 1927, [Convention date]. Rocking seats.-A tilting seat 1 is pivoted at 4 to a supporting pillar 3, and its motion is resisted by the spring 9 acting upon a plate 6 with which engages bars 10, 11 carried by the seat supports 2. The tension of the spring may be adjusted by means of the hand wheel 8. In the modification shown in Fig. 4, the seat can move in all directions.

1,155Q22us `A. sToLL TILTING CHAIR April 2, 1930.

Filed Sept. 4, 1928 l 2 Sheets-Sheet 1 April 22, 1930. A. sroLL 1,755,228

/ TILTING CHAIR Filed Sept. 4, 1928 2 Sheets-Sheet 2 ffdra-wings,in which;

. Patented Apr.i22 ,.193 of i l ALBnn'rs'roLnon KOBLENZ," swrTzERLAivn f `A'jiiplicaaiien filed September14,'1928;SeralNo. 3 O3;792,. and in GermanyvlJecemberi, 192.7.

chairs with a' Vtilting seat', ai pivot' conn@- r rtion between the YseatV and the rod"carrying the seat and a spring which opposes the tilt' ing of the seat are known; Iny one kind vof Vajthese chairs Ydirectly underneath thefseat a f :horizontalV coil spring is Varranged'A which is! s ple provided with a vuniversal joint ini order #compressed on tilting the `seat inthe one'jdirection,' preferably in the rearwarddirection; 7 a tilting ofthe seat in any other direction 10 however is impossible. f

T Further chairs are known the pedestal of which is provided with a universal joint j which is positioned in a'certain distance from the seat in order to enable a tilting of the seat ,15 ,in all directions. Such chairs are'not sufli- 'ciently steady especially in the raised posig tions .of the seatfas the. distance between the seatand the universaljoint is thenv so great ythat at an inclination of the seat the common centre of gravity ofy the 'chair and the load imposedthereon lies beyondthe pedestal of the'chair; f i l These disadvantages are eliminated by the fchair'according to .the presentinvention in that the pivot connection on thev upper end of the rod is placed directly underneath the seatand that the spring mounting enables a tilting of the seat fin at least twov directions.;

Y In this arrangement no displacement ofv the 3 0 centre o-fgravity to speak ofoccurs'when the `seat is tilted iniany direction,rv the chair has i the same steadiness as an ordinary chairfand moreover the advantages ofa ,tilting seat. V- The chair according to the invention showsj theI further feature of simplicity in over .the known constructions.l

` 1n' ka preferredconstructional example'v a plate orthe like isk rigidly xedto the "seat V,and :a seco-nd plate kisfnonsymmetrically `ar` ranged -relativelygto the rod and;V pressed against;v the first plate by the springisur- V-` rounding the rod so that tothe tilting of the seatin dierent 4directions Vdifferent 'resist-1 45 ances are opposed.

'Constructional examp'les :i of "the subject i matter ofthe invention are illustrated in the Fig. 1 shows a verticalseetion ofthe tilt- Wing'seat o-f'arst-constructional example. Y

design secured tothe latter;V

the seat takes placeby shifting the load tois a plan View yof 3 with theseat "I removed.

' Fig. 3 shows another constructie-nal exam?.

ple in which theseat tilts in one direction-only and'il Y Y 5 F ig. 4 shows a further constructionalexamtorenable a tilting to all sides.

Fig." 5 is avertlcal-sectiono-ffa portion of the seat together with` the upper part of i the' rodand j Fig.; e is a 'pian' view of Fig; 5 with the Seat removed'of a' further constructional example. Y

`In the constructional vexample according to" Figs. 1 and z2, the-seat'l is rigidly secured` to the vsupports Qfor the seaty and thesesupf Yports are pivoted bymeans of aY single pintle 4. On therod a bush5` isdisplaceably arrangedl to whichaplate 6 is screwed and.;

'Between thezhand` wheel 8 andthe' dished.

plate 6 a coil spring 9 is inserted( In thesupports for the seat,"in .parallel position to thepin 4, are Ymounted twobars is pressed by the. actionofthe spring 9. The

tensioning of the spring 9 can be regulated i Y by means of the hand wheel 8.." y

f the person sitting on the seat leans backward andl consequentlyshiftsfthe load to the rear of the seat, i.l etowards-the bar 10, the f seat V,tilts about the pintle 4, and thefbar ,.10

V10'and 11 against'which the dished lplate 6V moves'the dishedplate 6 together with the f bush k5 'downwards wherebythe'spring 9 is i compressed. A similar effect Vis causedby I shiftingl the load forwards in which case it is .the bar-.11 which displacesthe dished plate touether with thebush 5 relativelyto the rod.

.rnaad Vof the bmio and n miiersmight beprovided.l -V v v The' constructional example according to Figi 3 diersfrom'the one Just described infp that the plate 6, for instance by `bendingjits edge portion 12 around the bar 11 is rmly l Thereby atilting'of wards thebar-ll as indicated by the larrow Vby acts on agreater leve A, a tilting of the seat in the opposite direcagainst the plate 14 by means of a spring' 9. This construction enablesatiltingt thefseatx in every direction, the plate 6 being preferably made of circular shape, whereby-the'rseat l on tilting in any direct-ion carries out aturning movement" iniithis Idirection abioutt-h'e spherical surfacel andtherebydisplaces the iplate '6 and the bush 5 togetherwithvi'tin .the longitudinal direction -oftherod against the actiono'f the springt. v InailV the constructional examples theinclination-of the seat isflimited bythe distance between the hand wheel '8 and! the plate 6 or the bush 'and the sleeve I respectively.

The placing iin'thefirst:constructional eX- ample of one "of the bar 's'lOorfll respectively vfurther away Vfron'i'the pintle'4 than the other enables the .facilitating of, the tilting of the seat towardsl the corresponding side as fthe weight of the person'sittingo'n the seat ,thererarm'. v

In"v the i constructienal example 'illustrated in-A Figs. 5 and 6 the seat Lis screwed on to two f plvot connection consisting of two pintl'es 4 and =5 disposed' at' rightvangles ,to veach other.'

5 whichisfdisplaceably mounted on; the rod collateral supports (2. 3 .is the rod-which ysupports 2 ,for'the seatby. meansof across Aplatefl4 is further rigidly connected to the supports Zier 'the seat. Vplate fcooper'ates with the plate 14 and is secured toa sleeve A-pin 15g-is arrangedin'thetransverse direction in .the 'rod' 3 and secures theY spring washerl'fin its position wherebythe depend- Y Lino.,

y g `d-geot-the'washerprevents a'disengage- 5 haslopeni'ngs ,17 throughwhicli thepinlS projects. '501i the sleeve a'ha'hd vwheel 8 is 'arranged which engages' "al screw threadonthe upper portion of Y fthesle'eve.5.i Between'ithe vhandwheel g andthe washerl a' coilispfring 9'isinserted which pressure between .the'plates 'can'be varied 'by `fpres'sefs the 'plate v6, against"the fplate 14.' "The tensi'ningsof Athe "spring 9 fand thereby lthe isistaricefis Topp dsed, ,the :lever farms f wh-ich @tilting oitlie seat is required. tot be effected in an easy manner, whilean occasionalforvward'tilting of the seat or a tilting to the sides,mustfheinppesed by a greater resistance. ln the present construction, however, not only "--thelresistance but also the angle of inclina- .tion in the, different ldirections varies and it is particularly: the backward itilting'opposed ,il by, .the least lresistance ythat shows thelargest .angular:displacement :instead of a'fcirculargplate 6. apolygon f shapedplateimightbe used.

The present invention provides ',ior a, chair fwitha'tiltingseat which isfadaptedto be suit'- ably, Vtiltedl in ,various directions to a various extent, based on simplef constructional de- Isign. l

I claim:V Y l Y l. A tilting chair, comprising ,in ,eombina- 1t-ion, ,-a seat, a vertical rodca'rrying said seat, a A'pivot connection between Said-'seat and said rod, said pivot connectionbeing arranged ,Idi` --rectly underneath' the seat, a 'bushmounted K p thread, and Va coiLspringv surrounding said carries theseatand whlchis connectedto the rod and opposingthe' 'tiltingof said seat in. at

againstfsaid hand iwhee'l and the latter serving to 'adjust'the compression rofisa'id `coil spring least two directionsnsaid 'coil spring abutting,

" 2. A tilting chair comprisingin combinav tion,a seat, arod'carryingcsaidfseat,'.a pivot;

yconnection"betweensaid seat and said rod, j said 'pivot connection beingV arranged 'directly underneath' the seat, a spring. opposing the :tiltingiof the seat, a member rigidly connect- 'Ted tolslaid seatya second plate: member pressed against the lirst membery by the action of the f spring and presenting va variable resistance tothetilting'oftheseat. Y

' tiltingV chair comprising -in combinavpivot connection between said seat and 'said rod, said ,pivot-connection being Yarranged directly'underneath-the" seat, a spring opposl funsymmetricallyf arranged `relativel-ycto the roddorthe purp.osefof-fvarying the amountfof inclination oiiithe seat as wellsas theopposi tion to; -the rcorrespondingi itiiltingsl inrit-he evarious ydirections and pressedzaggainstz the fi'rst- :imemberiby the actionzof; the springf andfso aritheloadfon-lthe gseat, actsgupon'the Spring;srangedfthatto the ti-ltingof .thegseaty inthe .van-yan conseqience otlrefunsymmetricalar# rangement-@tilesalate@ f lnlflig.-Y l5 ',foriinstancer theatiltijng, :Of-the Various directions avariableresistanceisoption, ati'lting, seat, arod'carrying said seat, al l tion, a seat, a rod carrying said seat, a pivot connection 4between said seat and said rod, said pivot connection being arranged directly underneath the seat, a spring opposing the tilting of the seat, a member rigidly connected to said seat, a second plate member unsymmetrically arranged relatively to the rod for the purpose inclination of the-seat as Well as rious directions, a bush mounted onsaid rod and provided withA exterior.V Yscrew said seat.

5. A tilting tion, a central supporting rod, a pivot con-y necting the seat to the upper'end of the rodV die Ci ,l es

- rectly .beneath rodand engaging the seat, a coil spring surrounding the rod to urge 'said plate against the seatl and the and means at the lower end of the spring supporting said rod to adjustthe tension of the spring toregulate ,the tilting'resistance'.

Inv testimony whereof I have ysigned. vmy name to this specification. Y v

' f ALBERT SKTOLL.

ofvarying the amount o f' the opposly v p tion to the corresponding tilting in the va.y

thread, f v 1 said second plate being rigidly xed t'osaid bush, a transverse kpin vpassing through said i rod and serving as an abutment-to the lower,

end of said coil spring, the latter vpressing said; bush and thereby said secondv plate against Vthe rst plate for opposing to Vthe .tilting of Y chair comprising in combination, a central supporting rod, apivot connect: ing the seat to the upper end of the rod direct- 1 ly beneath the seat, a plate slidableon the rod and engaging the seat, andaJ coil spring sur- Y I rounding the rod'to urge said plate against `f the seat andthe latter into normal position.

6. A tilting chair comprising in combina--V the'seat, a plate slidable on rthe latter into normal position, 

